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"This Is Us" star calls president's speech after mass shooting "shameful."

President Donald Trump spoke about the Parkland, Florida shooting that claimed the lives of 17 people this morning, stressing the need to talk about mental health while failing to bring gun control into the conversation, that didn't sit too well with Mandy Moore.

The "This Is Us" star immediately took to Twitter to vent that her "blood is boiling" while watching the televised press conference.

"I am absolutely baffled watching the President speak about the tragedy in #parkland and not ONE word about guns," she wrote. "Shameful. My blood is boiling. Something has to change. Bring on the midterms so we can use our power to vote out politicians who continue to do nothing."

Her co-star Denis O'Hare -- who appeared as William's lover on multiple episodes of the NBC show -- also spoke out against the president. "Listening to Donald Trump attempting to be sincere is painful," he tweeted. "We have no leader in this country. No one to inspire us. No one to comfort us. No one to govern."

While Trump began his speech saying "police responded to reports of gunfire," he didn't return to the issue. Instead, he praised the work of law enforcements, first responders and teachers for their "courage" and vowed to visit the community to meet with families and local officials.

"I want to speak now directly to America's children, especially those who feel lost, alone, confused or even scared: I want you to know that you are never alone and you never will be," he said. "You have people who care about you, who love you, and who will do anything at all to protect you. If you need help, turn to a teacher, a family member, a local police officer, or a faith leader. Answer hate with love; answer cruelty with kindness."

He also promised to work with local and state leaders to "tackle the difficult issue of mental health" and said his "top priority" would be "making our schools and our children safer."

Following the speech, former President Barack Obama tweeted out his official statement, stressing the importance of "common-sense gun safety laws."

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